Detection of Heart Sounds in Children with and without Pulmonary Arterial Hypertension―Daubechies Wavelets Approach

22 pediatric subjects (9 males and 13 females, median age 6 years, range 0.25-19) undergoing right heart cardiac catheterization. 11 subjects had pulmonary arterial hypertension (PAH) with mean PAP ≥ 25 mmHg, and 11 subjects had normal pulmonary arterial pressures with mean PAP < 25 mmHg. All subjects had a pulmonary artery wedge pressure ≤ 15 mmHg.

A novel Daubechies wavelet algorithm using the wavelet coefficient 'D6' based on power spectral analysis for the automatic detection of 1st (S1) and 2nd (S2) heart sounds.

Four other published Daubechies wavelet-based algorithms for heart sound detection (Liang, Kumar, Wang, and Zhong).

Sensitivity (SE) and positive predictivity (+P) for the detection of S1 and S2 heart sounds.surrogate